Sixth Council Directive 77/388/EEC of 17 May 1977 on the harmonization of the laws of the Member States relating to turnover taxes - Common system of value added tax: uniform basis of assessment
Modified by
Council Directive 2004/7/EC of 20 January 2004 amending Directive 77/388/EEC concerning the common system of value added tax, as regards conferment of implementing powers and the procedure for adopting derogations